package com.atzon.fliter;

import javax.servlet.*;
import javax.servlet.annotation.WebFilter;
import javax.servlet.http.Cookie;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;

@WebFilter("/index.html")
public class SignFilter implements Filter {

    @Override
    public void init(FilterConfig filterConfig) throws ServletException {

    }

    @Override
    public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException, ServletException {
        HttpServletRequest request = (HttpServletRequest) servletRequest;
        HttpServletResponse response = (HttpServletResponse) servletResponse;
        Cookie[] cookies = request.getCookies();
        if (null != cookies && cookies.length > 0) {
            boolean tag = false;
            for (Cookie cookie : cookies) {
                if ("userInfo".equals(cookie.getName())) {
                    tag = true;
                    break;
                }
            }
            if (tag) {
                Object obj = request.getSession().getAttribute("userId");
                if (null != obj) {
                    response.sendRedirect(request.getContextPath() + "/view/home");
                    return;
                }
            }
        }
        filterChain.doFilter(request, response);
    }

    @Override
    public void destroy() {

    }
}